diff --git a/reference.txt b/reference.txt
new file mode 100644
index 00000000000..59243375cf6
--- /dev/null
+++ b/reference.txt
@@ -0,0 +1 @@
+1b2baf889af4d2f0b5439858b3080a8d69862fb6
diff --git a/references.txt b/references.txt
index 950b329f753..ab7e2a0068e 100644
--- a/references.txt
+++ b/references.txt
@@ -133,3 +133,4 @@ e55a31dfe4d24f46d0a24967ab1bc88ba8bfcc85
 36d17839ce02e3e2ea0c79cfbd418d3e009db3f5
 45a4b2f74a442879e4efa73cfd2255b44e7e30a0
 1b2baf889af4d2f0b5439858b3080a8d69862fb6
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